Allow updating cache with 'update' key

src/constants.ts

@@ -1,7 +1,8 @@
 export enum Inputs {
     Key = "key",
     Path = "path",
-    RestoreKeys = "restore-keys"
+    RestoreKeys = "restore-keys",
+    Update = "update"
 }
 
 export enum Outputs {

src/save.ts

@@ -16,15 +16,17 @@ async function run(): Promise<void> {
         }
 
         const state = utils.getCacheState();
-
-        // Inputs are re-evaluted before the post action, so we want the original key used for restore
+        // Inputs are re-evaluated before the post action, so we want the original key used for restore
         const primaryKey = core.getState(State.CachePrimaryKey);
         if (!primaryKey) {
             utils.logWarning(`Error retrieving key from state.`);
             return;
         }
 
-        if (utils.isExactKeyMatch(primaryKey, state)) {
+        if (
+            utils.isExactKeyMatch(primaryKey, state) &&
+            !utils.getInputAsBoolean(Inputs.Update)
+        ) {
             core.info(
                 `Cache hit occurred on the primary key ${primaryKey}, not saving cache.`
             );

src/utils/actionUtils.ts

@@ -56,3 +56,10 @@ export function getInputAsArray(
         .map(s => s.trim())
         .filter(x => x !== "");
 }
+
+export function getInputAsBoolean(
+    name: string,
+    options?: core.InputOptions
+): boolean {
+    return core.getInput(name, options) === "true";
+}